The bigport 16V 4AGE. I do get a kick out of seeing these with their original 16valve units - the later 20V 4A-GE's are an easy source of extra power and a popular choice.
This one has a simple intake, what look to be Trust headers, and some interesting trim work to the timing cover! Otherwise impressively clean in there..

Possibly a little lairy for most, but just as fun if you dont mind the attention!
Id personally break the colour up with some faux-vintage racing livery, and hunt down some wider tyres; but eh, good fun as is.